Retort.



No. 851,409. PATENTBD APR. 23, 1907. f C. H. DUISDIEKBR.

RETORT.

APPLIoATIoN FILED SEPT. 25, 1905.

ALM rm y.

IE STATES PATENT @FFICIQ RETOFE'T..

Specification of Letters Patent.

Patented April 23, 1907.

Appleman nei september 25,1905. serai No. 279,916.

To LZZ whom it may concern..-

Be it known that I, CHARLES II. DUIS- DIEKER, a citizen of the United States, residing at Pekin, in the county of Tazewell and State of Illinois, have invented certain new and useful Improvements in Retorts; and I do hereby declare that the followingT is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates more particularly to retorts suoli as are used in bone kilns, ore furnaces, etc.

The object of my invention is to provide a retort so constructed as to be better adapted to withstand the heat to which it is ex osed; and further to provide means for combining or interlocking the retorts, both of which said objects are designed to prevent deformity of the retorts, on account of the intense heat to which they are subjected.

In .bone kilns, with reference to which my invention is specified, but to which it is not confined, longitudinal, tubular retorts are arranged vertically in parallel series, and are )rovided with suitable inlets at the top of the kiln and outlets at the bottom thereof whereby the. bone black is fed into the retorts and discharged therefrom when purified. Flame is blown from the side walls of the kiln transversely through the series of retorts therein so as to strike them about midway of their length, and the flame, as it strikes the retorts, is deflected both upward and downward a considerable distance enveloping a large central portion of each retort. rlhc flame enveloped central portions of the retorts as can readily be seen, become very highly heated, and in the absence of any suitable preventative means bulge and warp under the intenseheat, and soonbecome unsuited for use. In my invention, however, provision is made to prevent this deforming of the retorts, that has heretofore been experienced by increasing the thickness of the wall of the retort where subjected to the greatest heat, and by interlocking the retorts so that the walls thereof are held from bulging and collapsing.

In the accompanyingdrawings, Figure 1 shows two cyhndroidal retorts, provided with my improvements, looking toward the broad sides thereof, the retort at the right of the line :c being in vertical section. Fig.

lookine toward the narrow lateral faces thereof, the retort at the leftof the line z-z being in vertical section.- Fig. 3 is a plan view of four of my improved retorts showing the method of combining or interlocking. Fig. 4 is an upper end view of one of my retorts showing the varying thickness of the wall. Fig. 5 is an outer end view of one of the pairs of lues which I employ in combining or interloc ring the retorts. Fig. 6 is an end view of the key or wed e which I employ in combining or inter ocking the retorts. Fig. 7 shows a to view of the key or wedge which I employin interlocking the narrow lateral faces of the retorts, and Fig. 8 is `a similar View of the key or wedgewhich I employ for interlocking the broad lateral faces of the retorts.

Similar figures of reference refer to similar parts throughout the several views.

The retorts l, which are long tubular members, usually elliptical in transverse section as shown in the drawings, have their lower ends inserted in the upoer art of the boots 2, which said boots are fitted) in openings 3 in the bottom 4 of the kiln, and are usually provided with triplicate o )enings 5 through which the bone black is d'seharged from t 1e retorts as it is purified, and the said retorts extend vertically through the kiln to within a short distance of the top 6 thereof. In the said top 6 of the kiln, are o enings 7 corres )onding with the u )per env s of the retorts, tlirough which said openings are inserted slightly hop )er shaped' members 8 which in turn have tlieir lower ends inserted in the up ier ends of the retorts l, all of which is well known in the art and needs no further mention.

As has been hereinbeforc stated, the central portions of the retorts, being enveloped in the llame of the kiln or furnace, are subjected to intense heat, which decreases at l the lower and upper ends thereof. For the i purposey of better withstanding the intense heat, the wall of the central portion of the retort which is enveloped in the flame and which is usually about one half the total length is 'made thicker than the remainder of the retort, as is shown at 9, and is tapered l gradually to the thinner ortions at the ends. i The wall of the up ier end or top of the retort is. made. considera )ly thinner than the eentral portion 9, as shown at 10, so that the bone black as it enters the retort will be 2 shows two retorts similar to those in Fig. 1, i rapidly heated, and so as to reduce the IOO IIO

- retort.

weight of the retort. The wall of the lower end or bottom of the retort, while thinner than the central portion 9, is thicker than the upper end 10, as is shown at 11, to give it sufficient strength to support the weight of the retort and the contents. This varying of the thickness of the wall of the retort, not only better adaptsthe retort to stand the heat of the kiln or furnace, but also makes the burning of the material therein more uniform throughout the length of the As is shown in the drawings, I prefer to make the outer surface of the retort, uniform throughout its length, and have the increased thickness of the wall decrease the transverse area of the internal opening` y At intervals throughoutthe length of the retort, preferably near the upper and lower extremities of the increased thicker portion 9 thereof, as is shown in the drawings, are provided the pairs of lugs 13 on the broad ateral walls and the pairs of lugs 12 on the narrow lateral walls, the said pairs of lugs being, usually integral with the retort.

These lugs, as is seen in the drawings have their inner ocpposite faces 14 converging from the top ownward and diverging from their outer ends inwardly toward the retort, and are so placed on the retorts that when the retorts are properly placed in the kiln in parallel series, each pair of luvs 12 and 13 will be o posite a pair of lugs similarly placed on the adjacent retort, so that the key or wedge 15 or 16 will have its ends seated in pairs of lugs on adjacent retorts as is clearly shown in the drawings. The keys or wedges 15 and 16 which I use for combining or interlocking the retorts have their lateral faces, at each end, corresponding to the faces 14 of the lugs within which they areseated, that is the lateral faces converge from the top downward and from both ends inwardly as is evident from the dotted lines in Figs. 5, 6, 7 and 8. The degree of ta er of the keys or wedges 15 and 16 is such t ia't the expansion and contraction of the retorts only serves to more firmly unite the retorts, and any tendency toward looseness is obviated because the weight of the key or wedge holds it firmly against the faces 14 of the lugs 12 and 13.

It is desired to have the broad lateral walls of the retorts distanced somewhat farther apart than the narrow lateral walls consequently the keys or Wedges 15 which unite the broad lateral walls are somewhat longer than the keysI or wedges 16 which unite the narrow lateral faces thereof.

From the foregoing, it will readily be seen that the increased` thickness of the central portion of the retort ada ts it -to better withstand the heat to whic it is subjected, and further that the interlocking of the retorts combines them into a rigid structure and holds the walls from bulging, collapsing, warping or any 1other deformity to which the heat to which they are subjected would have a tendency to cause.

While I have described my invention particularly with reference to bone kiln retorts, I am aware and contemplate its use-in any similar kiln or furnace where the retorts are inclined to deform under the intense heat to which they are subjected. i

What I claim is:

1. The combination with a lurality of retorts suitably spaced toprovide circulating space therebetween, of key seats on the Walls of the retorts intermediate of the ends and keys supported by and adapted to engage the key seats on the facing walls of adjacent retorts for interlocking said walls.

2. In a kiln, the combination with a plurali ty of retorts, key seats on the outer walls of the retorts comprising pairs of lugs having their inner opposite faces converging downwardly and outwardly from the retorts, keys having their lateral faces converging from the top downward and from the ends inwardl the said keys having their ends seatedwithin key seats on adjacent retorts for uniting the walls thereof.

In testimony whereof I have affixed my signature, in resence of two witnesses.

C ARLES H. DUISDIEKER.

Vtlitnesses:

MARY E. COMEGYS, E. M. GILES. 

